Speckled pets are hard ones for me to match. There aren't many petpets that have the speckled look, and so I usually end up going for green/white which doesn't always have the same effect.
I left out all strawberry petpets because they are lab ray only. My favorite is the christmas mortog, but it is also probably the most expensive one of the bunch. Actually I'm not sure about that as I didn't price check, but I know the mortog isn't buyable.
I already matched an asparagus chia here. I'd maybe suggest this too.
Let me know if you need the names of any of these.